Hi Rick, I would like to ask you if you have used the %RCS_reg package, I am using it and I have found that I can run the results but I cannot generate the RCS curves. The log reports an error saying, I would like to consult you on what this can be done. Here is my code%RCS_Reg( infile= NHSALL_2, outfile= NHSALL_out, Dir_data= , Main_spline_var= LBXVIDMS, ref_val= , AVK_msv= 0, knots_msv=5 50 95, Oth_spline_var1=, typ_reg= cox, dep_var= mort_all, surv_time_var= PERyear_EXM, adjust_var=sex1 sex2 race1 race2 race3 race4 BMI1 BMI2 BMI2 edu1 edu2 edu3 income1 income2 income3 drinking1 drinking2 drinking3 smoking1 smoking2 smoking3 phyacty1 phyacty2 phyacty3 DURDM1 DURDM2 DURDM3 MEDDM1 MEDDM2 MEDDM3 MEDDM4 hbp cvd ghpgp hbc, Y_ref_line= 1, max_Xaxis= , exp_beta= 1, round=, specif_val= ); quit; . The variables are converted to dummy variables except for age which is continuous.